lkml.org 
[lkml]   [2003]   [Mar]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: reducing stack usage in v4l?
From
Date
On Tue, 2003-03-11 at 09:19, Gerd Knorr wrote

> That is wrong, at least the 2k memset/call mentioned by Andrew. There
> are lots of memset() calls, but they all are within the case switches
> for the ioctls and zero out only the structs which are used in that code
> path, so it is actually much smaller (~50 -> ~300 bytes maybe, depending
> on the ioctl).

gcc sometimes does things like allocate all the objects in case
statements at entry time. I assume its a performance win to do so.

Alan

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:33    [W:0.054 / U:4.540 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site